{"answers":{"affected":"1 open source package ship an affected version, including boxy-fixture-pfa.","exploited":"There is no known exploitation of MAL-2026-13047 in the wild and no public exploit code.","fix":"Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.","what":"MAL-2026-13047 is a malicious package in boxy-fixture-pfa, published on 5 Aug 2026."},"fix_prompt":"MAL-2026-13047 is a malicious package: boxy-fixture-pfa (npm). Every version was published to cause harm.\n\nTask:\n1. Search this repository's dependency manifests and lockfiles for the package, including transitive dependencies.\n2. If it is present, remove it, regenerate the lockfile with the project's package manager, and replace whatever it was used for.\n3. List any CI runners, developer machines or containers that installed it, so their secrets can be rotated.\n4. If the package is not used anywhere, say so and change nothing.\n\nReference: https://insights.sbomify.com/MAL-2026-13047/ (Markdown: https://insights.sbomify.com/MAL-2026-13047/index.md)","id":"MAL-2026-13047","markdown":"https://insights.sbomify.com/MAL-2026-13047/index.md","name":"MAL-2026-13047","record":{"aliases":[],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"On require() of the package, _polyfill.js downloads a platform-specific binary from hardcoded destinations reassembled at runtime from split-string arrays (oob-worker.cf1006.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf103-070.workers.dev), writes it to /tmp under a hidden name (.cache_\u003chex\u003e) or to %TEMP%\\dotnet_diag_\u003chex\u003e.exe on Windows, chmods it 0755, and spawns it detached via /bin/sh -c '\u003cpath\u003e \u0026' or cmd.exe /c start /b. A DNS-TXT fallback channel reassembles a base64 payload from chunked TXT records under *.dl.wel1.ru when HTTPS is blocked. The dropped binary is disguised with system-daemon-style filenames (dotnet_diag_,.cache_,.analytics_state) and the code carries opt-out checks on DISABLE_TELEMETRY / ANALYTICS_OPT_OUT / DO_NOT_TRACK as cover framing. A second dropper module lib/telemetry.js (81 KB, labeled 'Analytics SDK') ships the same base64-decode -\u003e filesystem write -\u003e chmod 0755 -\u003e cp.spawn('/bin/sh', ['-c', filePath + ' \u0026']) chain with split-property-name obfuscation (child_'+'process, chmod'+'Sync); it is not referenced from index.js in this version but is present in the tarball as an alternate loader. Installing or importing this package results in arbitrary attacker-controlled code execution on the host.","ecosystems":["npm"],"exploits":{"exploitdb":null,"first_seen":null,"github_poc":null,"max_poc_stars":null,"metasploit":null,"nuclei":null,"refs":[],"tier":null},"has_fix":false,"headline":"Malicious code in boxy-fixture-pfa (npm)","id":"MAL-2026-13047","indexable":true,"kev":null,"kind":"malicious","links":{"ecosystem":"npm","product":null,"products":[],"type":null,"year":"2026"},"n_packages":1,"n_references":null,"packages":[{"ecosystem":"npm","fixed":[],"introduced":[],"last_affected":[],"package":"boxy-fixture-pfa","purl":"pkg:npm/boxy-fixture-pfa","source":"MAL-2026-13047"}],"products":null,"published":"2026-08-05","related":[],"sources":[{"class":"attribution","licence":"Apache-2.0","name":"OpenSSF Malicious Packages","prefix":"MAL"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":null,"updated":null,"vendors":null},"summary":null,"url":"https://insights.sbomify.com/MAL-2026-13047/"}